Grinding



M. J. FLAVIN.

GRINDING, POLISHING, AND BUFFING MACHINE.

APPLICATXONVFILED SEPT. 18, 1915.

1,1 93,886. Patented Aug. 8, 1916.

3 SHEETSSHEET I.

WITNESSES: INVI'JNTOR. WW [WC/Fad J 1 740572,

A TTOR NE Y.

M. J. FLAVIN.

GRINDING, POLlSHING, AND BUFFING MACHINE; APPLICATION FIL'ED SEPT. 18.1915.

1,193,886. PatentedA 8,1916.

3 SHEET EET 2.

IN V EN TOR,

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M. J. FLAVIN.-

GRINDING, POLISHING, AND BUFFING MACHINE.

APPLICATION FILED SEPT-18,1915- Iaten ted Aug. 8, 1916.

3 SHEETS-SHEET 3.

VIII/Ill,

WITNESSES.-

IN VENTOR, Mia/24:2 J [74 /172,

A TTORNE Y.

TUNTTED STATES PATENT @FTTEE.

MICHAEL J. FLAVIN, OF GREENFIELD, MASSACHUSETTS, ASSIGNOR TO WILLIAMBARRY, OF ORANGE, MASSACHUSETTS.

GRINDING, POLISHING, AND BUFFING MACHINE.

Application filed September 18, 1915.

To all whom it may concern:

Be it known that I, Mist-man J. FLAVIN, a citizen of the United Statesof America, and resident of Greenfield, in the county of Franklin andState of Massachusetts, have invented certain new and usefulImprovements in Grinding, Polishing, and Bufling Machines, of which thefollowing is a full, clear, and exact description.

This invention relates to a machine primarily designed for the polishingof cross sectionally circular articles and more especially those havingbulging or convex, concave, or ogee contours.

The object of the invention is to provide amachine in which the articleto be polished is mounted on the upper end of a spindle having means forthe rapid rotation thereof and in which a head carrying a polishlngwheel or wheels is capable of movements both in a downward direction tobring the polishing element into the region of the mounted piece to bepolished and transversely movable for presenting the polishlng elementagainst all portions of the curved side of the piece.

The invention is described in conjunction with the accompanying drawingsand is set forth in the claims.

In the drawings:Figure 1 is a plan view; Fig. 2 is a side elevation ofthe improved polishing machine. Figs. 3 and 4 are respectively a partialrear elevation and partial side elevation of the machine showing amodification in the manner of mounting the frame by which the polishingwheel spindle is carried. Figs. 5 and 6 are elevations at right anglesto each other showing arrangements whereby the usual upright workcarrying spindle may be revolubly ad- .justed whereby the work may beheld in the most advantageous position for receiving the action of thepolishing wheel thereon. F igs. T and 8 are sectional views as taken online ,77, Fig. 2, showing the clutch device for connecting the workcarrying spindle with the pulley for the driving thereof,one thereofshowing the parts in clutch and the other showing the parts out ofclutch. Fig. 9 is a horizontal cross sectional view as taken on line 99,Fig. 6, for showing a detail of construction hereinafter referred to.

In the drawings, A represents the frame of the machine at the rear endof which is mounted a horizontal transverse driving Specification ofLetters Patent.

Patented Aug. 8, 1916.

Serial No. 51,373.

shaft B having a driving pulley C whereby through belt D the shaft isdriven.

At the forward end of the frame is a substantially upright work carryingspindle E which is rotatable in and through the frame A and is capableof an endwise sliding movement within a slight range vertically throughbracket-like members of the frame.

The upper and lower ends of the spindle are respectively above and belowthe frame members as shown in Figs. 2 and 7 and 8. The work is carrieddirectly or through any equipment therefor at the upper projecting endof the spindle. The spindle has loosely thereabout the pulley F whichrests on the lower bracket member a of the frame. The spindle betweenthe lower bracket member a and the upper bracket member a of the framehas affixed thereon a downwardly convergent clutch member 5, and theloose pulley F is formed with an upwardly open, downwardly convergent,clutch socket (Z, these adjacent parts so coacting that when the spindleis permitted to descend gravitatively under its own weight and the additional weight of the conical clutch member Z), it will become engagedwith the pulley and be rapidly rotated by the latter through the drivingconnection therewith of the crossed belt 7 driven from the pulley g onthe driving shaft B of the machine.

G represents a treadle motion consisting of the pedal member h, theintermediately pivoted lever h and the connecting link 71, The forwardend of the intermediately pivoted lever comprised in the treadle motionlies closely under the lower end of the spindle, and normally disengagedfrom, or ineffective relatively to, the spindle whereby the latter maynormally gravitatively and automatically be in clutch with its drivingpulley F. The treadle is operated to disconnect the spindle from thedriving means therefor when the work is to be mounted on or removed fromthe spindle.

Referring to Figs. 1 and 2, H represents a frame mounted for a verticalswinging movement on and relatively to the driving shaft, such frameextending forwardly from the shaft to the front end of machine, and suchframe is also capable of a movement horizontally and transverselyrelatively to its spindle in addition to its capability of transversehorizontal movement. The frame as shown comprises, or is employed inconjunction with, a yoke J which is mounted tiltably or for a partialrevoluble movement on the main shaft B. The rear portions of the membersof the frame H are connected by trunnion joints 7;, centrally to theupper and lower portions of the yoke J whereby the frame has theaforementioned capability of transversely and horizontally swinging onthe substantially vertical pivot axes i. The frame'H is formed at itsforward end with a head K in which is mounted a substantially transverseshaft L, intermediately carrying a pulley L and having at its extremity,which is adjacent and above the work carrying spindle E, one or morepolishing wheels 70 Wheels of different sizes and character are to beinterchangeably employed on the polishing wheel shaft L. In Figs. 1 and2, two wheels are shown, the one 72 being of a larger diameter than theone 7c ,one of these wheels being of a coarse abrading character while.the other is to be finer and for the finishing of the work.

m represents a portion of a cord or chain understood as running over anelevated sheave and having counterpoise weight (not shown) and as commonin swinging tool carrying heads or frames.

The polishing wheel shaft pulley L is driven from the main shaft pulleyM by the belt N.

0 represents a handle rigidly connected to the polishing wheel shaftcarrying head,

and to be made use of manually for bringing the polishing wheel down toproximity to the piece to be polished and by transverse movement againstthe side of the piece.

By employing a cross belt for driving the spindle E, the work andpolishing wheel have relatively opposite rotations, which manifestlyresult in an acceleration of the polishing action.

In the utilization of the machine, the operative first presses the pedalmember of the treadle motion, causing a cessation of the rotation of thework carrying spindle, and then mounts the work on the upper end of suchspindle, whereupon he releases the treadle permitting the spindle tobecome clutched and rapidly rotated; he then, through the handle 0downwardly swings the frame to bring the polishing wheel onto thesurface of the usually non-cylindrical piece to be polished and movesthe. frame transversely as required to maintain the polishing wheel inits working contact on the bulging or hollowing surface of the piece,maintaining the wheel in its working position until the part has beenfinished.

In Figs. 5 and 6 the portion of the frame A in and through which thework carrying spindle E is substantially vertically mounted, is formedas a head P mounted on a bracket-like portion A of the frame proper fora tilting or partially revoluble adjust ment on a horizontal pivot axiswhich is longitudinally of the machine and whereby the spindle and itswork may be tilted to proper inclination in a plane crosswise of themachine, so that round pieces of work of certain peculiar shapes may beso held while being rotated as to better permit the operative accessthereagainst of the polishing wheel or wheels.

In Fig. 6 the revoluble adjustable head P is indicated as having a studP which passes through and beyond a hole therefor in the bracket portionA of the frame and receives the nut 25 for the confinement of the headin its proper adjustment.

. WVhen the machines are equipped with the revolubly adjustable head Pso that at times the work carrying spindle E is swung considerably fromthe vertical line, an intervening thrust rod u is provided for an up anddown, but non-rotative movement through a suitable part of the frame,such thrust rod having an arc-shaped extension a which has a curvaturecorresponding to the path of movement of the end of the revolublyadjustable spindle; and therefore, irrespective of the degree ofinclination of the spindle (within reasonable limits) the treadle motionwill always be effective for its proper coaction with the spindle.

In Figs. 3 and a the frame H which carries the polishing wheel head atits forward end instead of being pivotally jointed to the yoke J,whereby it may swing horizontally relatively to the tiltable yoke, isindicated as rigidly connected to the yoke, but the yoke is slidablealong the trans-. verse main-shaft B so that through the sliding as wellas the tilting motions of the yoke, substantially the same movements maybe imparted to the polishing wheel head as have been already described.

The wheels to be employed in this machine while most times are polishingwheels may at election of the user, be grinding wheels or buffingwheels.

I claim:

1. In a polishing machine, in combination, an upright spindle forcarrying the work at its upper end, and means for rotating the spindle,a head, carrying a horizontal polishing wheel, above the work spindle,pivotally mounted and free for a swinging movement in a vertical planedown into proximity to and upwardly away from the spindle, and alsofreely movable transversely relatively to the axis of the spindle, andmeans for rotating the grinding wheel.

2. In a polishing machine, in combination, an upright work-carryingspindle having a clutch member thereon, a pulley through which thespindle is substantially vertically movable, formed with a clutchmember, a treadle coacting with the spindle for vertically moving thelatter for effecting the clutching and unclutching of the spindle andpulley, a head carrying an axially horizontal polishing w'heel above thework spindle pivotally mounted for a vertical swinging movement downtoward and upwardly away from the spindle, and also movable transverselyrelatively to the spindle, means for rotating said pulley, and means forrotating the grinding wheel.

3. In a polishing machine, in combination, a substantially uprightspindle for carrying the work at the upper end thereof, a head,in whichsuch work carrying spindle is rotatively carried,m0unted for revolubleadjustment on a horizontal axis, and means for rotating the spindle,ahead, carrying a horizontal polishing Wheel, above the work spindle,pivotally mounted and free for a swinging movement in a vertical planedown into proximity to and upwardly away from the spindle, and alsofreely movable transversely relatively to the spindle, and means forrotating the grinding wheel.

4. In a polishing machine, in combination, an upright work-carryingspindle having a downwardly convergent clutch member thereon, a pulleythrough which the spindle is substantially vertically movable, formedwith an upwardly open, downwardly con vergent clutch socket and belowwhich pulley the spindle extends, a treadle coacting with the lower endof the spindle, and operable to vertically move the latter to lift theconical clutch member from, and to permit it to fall to engagement inthe conical socket in said pulley, a head carrying a horizontalpolishing wheel above the work spindle pivotally mounted for a verticalswinging movement down toward and upwardly away from the spindle, andalso movable transversely relatively to the spindle, means for rotatingsaid pulley, and means for rotating the grinding wheel.

5. In a polishing machine, in combination, a supporting frame, ahorizontal driving shaft mounted in the rear portion of said frame, anupright spindle, for carrying the work at the upper end thereof, mountedin a forward portion of said frame and provided with a pulley, a pulleyon said driving shaft and a belt connecting such pulley and the spindlepulley, a frame mounted for a vertical swinging movement on said drivingshaft, extended forwardly therefrom, such frame being also capable of amovement horizontally and transversely of the said spindle, and providedat its forward extremity with a head above the spindle, a horizontalshaft in said head provided with a polishing wheel, pulleys on thedriving shaft and the polishing wheel shaft, and a belt around saidpulleys.

6. In a polishing machine, in combination, a supporting frame, ahorizontal driving shaft mounted in the rear portion of said frame, anupright spindle for carrying the work at the upper end thereof mountedin a forward portion of said frame and provided with a pulley, a pulleyon said driving shaft and a belt connecting such pulley and the spindlepulley, a yoke embracing and revolubly movable relatively to the drivingshaft, a frame pivotally connected on a vertical axis to said yoke for ahorizontal swinging movement transversely relatively to the workcarrying spindle, extended forwardly from the yoke and provided at itsforward extremity with a head above the work carrying spindle, ahorizontal shaft in said head provided with a polishing wheel, pulleyson the driving shaft and the polishing wheel shaft and a belt aroundsaid pulleys.

7. In a polishing machine, in combination, a supporting frame, ahorizontal driving shaft mounted in the rear portion of said frame, awork spindle carrying head mounted for a revoluble adjustment on ahorizontal axis at the forward part of the frame, a substantiallyupright work carrying spindle rotatively mounted in said head andprovided with a clutch member, a pulley loose on said spindle andthrough and below which the spindle extends, formed with a clutch memberwith which the clutch member of the spindle coacts, a treadle coactingwith the spindle for vertically moving the latter for effecting theclutching and unclutching of the spindle and pulley, a pulley on thedriving shaft and a belt connecting such pulley and the spindle pulley,a frame mounted for vertical swinging movement on such shaft extendingforwardly therefrom and provided at its forward extremity with a headabove the work carrying spindle and such head-provided frame being alsocapable of a movement horizontally and transversely of the spindle, ahorizontal shaft in said head provided with a polishing wheel, pulleyson the driving shaft and the polishing wheel shaft, and a belt aroundsaid pulleys.

8. In a polishing machine, in combination, a supporting frame, ahorizontal driving shaft mounted in the rear portion of said frame, awork spindle carrying head mounted for a revoluble adjustment on ahorizontal axis at the forward part of the frame, a

substantially upright work carrying spindle rotatively mounted in saidhead and provided with a clutch member, a pulley loose on said spindleand through and below which the spindle extends, formed with a clutchmember with which the clutch member of the spindle coacts, a treadlemotion, a vertical thrust rod vertically, but nonrotatively, guided inthe frame, with the lower end of which a member of the treadle motioncoacts and the upper end of which is located adjacent the lower end ofthe spindle and is provided with a transversely extended are formedextension having a curvature corresponding to the path of movement ofthe end of the revolubly adjustable spindle, and adapted to coact withthe spindle for vertically moving the latter for effecting the clutchingand unclutching of the spindle and pulley, a pulley on the driving shaftand. a belt connecting such pulley and the spindle pulley, a framemounted for vertical swinging movement on such shaft extending forwardlytherefrom and provided at its forward extremity with a head above thework carrying spindle and such head-provided 9; In a polishing machine,in combination, a work carrying spindle having a clutch member thereon,another clutch member coacting with the first clutch member and meansfor rotating it, and means for throwing the one clutch member into andout of engagement with the other, and a head, carrying an axiallyhorizontal polishing wheel, above the work carrying spindle, pivotallymounted and free for a swinging movement in a vertical plane down intoproximity to and upwardly away from the work carrying spindle, and alsofreely movable horizontally relatively to the work carrying spindle.

Signed by me at Springfield, Mass, in presence of the subscribingwitness.

MICHAEL 'J. FLAVIN.

Witness G. R. DRISCOLL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

